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Auto merge of #17312 - regexident:function-fn-ptr-type, r=Veykril

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Add `Function::fn_ptr_type(…)` for obtaining name-erased function type

The use case of this function if being able to group functions by their function ptr type.

cc `@flodiebold`
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bors 2024-06-03 12:16:29 +00:00
commit fa41f196b5
1 changed files with 8 additions and 0 deletions
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8
src/tools/rust-analyzer/crates/hir/src/lib.rs
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@ -1884,6 +1884,14 @@ impl Function {
Type::from_value_def(db, self.id)
}
pub fn fn_ptr_type(self, db: &dyn HirDatabase) -> Type {
let resolver = self.id.resolver(db.upcast());
let substs = TyBuilder::placeholder_subst(db, self.id);
let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
let ty = TyKind::Function(callable_sig.to_fn_ptr()).intern(Interner);
Type::new_with_resolver_inner(db, &resolver, ty)
}
/// Get this function's return type
pub fn ret_type(self, db: &dyn HirDatabase) -> Type {
let resolver = self.id.resolver(db.upcast());